Can you help with sexing Aracaunas?

Hi all,
This time I need help sexing my Aracaunas hatched from Jody's eggs. They are six weeks old and I have several rumpless, and then 1 with just 1 tuft. The two dark ones are amazing in the sunlight!

The boys typically get 3 rows of bumps on their combs, so they appear wider than the girls. The female combs pretty much stay a single row of bumps on the peacomb. It is a little tough to say on the pics, as the combs aren't real clear. You can probably see that better in person. Also, you can check to see if anyone is getting any pointy saddle feathers yet.